Divers often come across weird, unexpected things. It’s not always a good idea to investigate up close. But when John Roney saw a tentacle just above him, he had to see what was happening. “Several ...

Beautiful blue velella jellyfish, also known as the by-the-wind sailor, have started to turn up on Jersey Shore beaches in recent weeks. Scientists say that due to the Gulf Stream's powerful winds ...

This iridescent rainbow jellyfish looks like the coolest nightlight ever. Known as the lobed comb jelly, its natural habitat is typically the open waters, but a few reside at the Monterey Bay Aquarium ...

Floating and drifting along the oceans' currents and coasts are thousands of different kinds of jellyfish. Some, like the lion's mane jellyfish, are bigger than a deep sea diver. Others, including ...

Like anything you love dearly, jellyfish must be handled with extreme care and tenderness. These deep-sea creatures offer a wealth of knowledge for researchers, but the handling required to complete ...

While typically found in warmer ocean waters, a brilliant blue jellyfish-like creature has been washing up on Jersey Shore beaches over the past week. The Velella velella jellies, also known as ...

This story appears in the October 2018 issue of National Geographic magazine. Moon jellies, which are found in shallow bays around the world, look like small, not entirely friendly ghosts. They have ...